One of the items that is very interesting in the period SD&G catalogs is how prominently the Sauer guns are presented. SD&G retailed a whole litany of very nice doubles. The 1909 catalog includes a wide range of Parker, LC Smith, AH Fox, Ithaca, and Lefever doubles for sale (among other lesser brands). But the Sauer guns are presented more prominently. The Sauer guns are advertised right behind the Daly guns in the catalogs and the photos/drawings of the Sauer guns are much larger than the other makes.
In the advertising superlatives, SD&G makes a big deal out of the Sauers being the finest "machine made gun in the world." The Dalys are presented as "entirely hand made guns." I always got a chuckle out of this as the highest grade Sauers are absolutely beautiful guns with impeccable fit and finish. In 1909, the ornately engraved Sauer model 60 retailed for $600, or $100 more than the Daly model 500 Regent Diamond quality gun. I was would guess the high-grade Sauers had at least a little bit of individual handwork in them (toungue firmly in cheek.)
In terms of the Craig's Daly, I don't think it is a rebadged model 40, or at least not a circa-1910 Sauer model 40. The 1909 SD&G catalog lists the Sauer model 40 as having both ejectors and game scene engraving. It does appear that Craig's gun has those. That said, earlier Sauer model 40s may not have had these features either (?). Let me taker a look at me 1902 and 1903 SD&G catalogs.
Ken